1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tigry1 [53]
3 years ago
5

G use the margin of error, confidence level, and standard deviation σ to find the minimum sample size required to estimate an un

known population mean μ. margin of error: $121, confidence level: 95%, σ = $528
Mathematics
1 answer:
kodGreya [7K]3 years ago
4 0
The sample size should be 73.

We use the formula

n=(\frac{z*\sigma}{E})^2

To find the z-score:
Convert 95% to a decimal:  0.95
Subtract from 1:  1-0.95 = 0.05
Divide by 2:  0.05/2 = 0.025
Subtract from 1:  1-0.025 = 0.975

Using a z-table (http://www.z-table.com) we see that this value goes with a z-score of 1.96.  Using this, our value for σ and our margin of error, we have:
n=(\frac{1.96(528)}{121})^2=73.15\approx73
You might be interested in
The Molina family went to a concert together
Mnenie [13.5K]
Dude that’s not an answer
6 0
3 years ago
Suppose the average of 15 consectutive numbers is 15. What is the average of the first five numbers of the set?
Marina86 [1]
15x15= 225

15x + 105= 225

15x= 225-105

15x= 120

X=8

X+ (x+1) + (x+2) + (x+3)…etc all the way up too +(x+14)=225

The first five numbers of the set: 8, 9, 10, 11, 12
7 0
1 year ago
The veterinarian weighed Oliva's new puppy, Benz, on a defective scale.
Mrrafil [7]

Answer:

\boxed{x = 10.28 \%}

Step-by-step explanation:

\frac{(26.75)x}{100} = 2.75 \\  \boxed{x = 10.280373832}

5 0
3 years ago
Seven times the difference of x and 4 is -10
4vir4ik [10]

Answer:

In this equation x = 2

Step-by-step explanation:

First, it is easiest to convert these words to numbers. That would make it

4 - <em>x  </em>· 7 = -10

First subtract 4 from both sides.

4 - <em>x</em> · 7 - 4 = - 10 - 4

Then you simplify.

-<em>x ·</em> 7 = -14

Divide both sides by 7.

\frac{-x(7)}{-7} = \frac{-14}{-7}


Then you simplify that fraction to 2 and thats how you get your answer.



7 0
3 years ago
0.4(x-0.45)=9.2 PLZZZZZ HELP!!!!!!!
Helen [10]

Answer:

0.4(−0.45)=9.2

2(−0.45)5=9.2

Step-by-step explanation:

=23.45

5 0
3 years ago
Other questions:
  • What is 0.0000012 in scientific notation
    14·2 answers
  • I need Help ASAP please
    6·1 answer
  • What is the area of the figure?<br><br> Enter your answer in the box.<br><br> 400<br> in²
    7·2 answers
  • Yuki's guppies have begun to have babies. She started with 5 guppies. One week later, Yuki counted twice as many guppies in the
    5·1 answer
  • 17/18 -3/7= need answer please
    13·1 answer
  • Free points: this is because of all the kindness I have seen on brainly:
    9·2 answers
  • Cost of a radio 25.50$ Markup 5% what is the new total
    12·1 answer
  • 10% of what is 7???!!!
    11·1 answer
  • Write the equation of the line from the graph.​
    8·1 answer
  • Write an equation of the parabola in vertex form. <br><br>No LINKS!!!! ​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!